Peculiarities of the formation of the caudiciform part of Petopentia natalensis (Schltr.) Bullock (Apocynaceae)

The anatomical and morphological structure of the seeds vegetative organs endemic caudiciform plant South Africa Petopentia natalensis (Schltr.) Bullock (Apocynaceae) has been investigated at different stages ontogenesis: seedlings, juvenile immature plants. It noticed that endosperm P. is developed similar to mesophytic representatives Apocynaceae family. Seedling hypocotyl also type in contrast those such succulents as Adenium obesum (Forssk.) Roem. & Schult. Pachypodium lamerei Drake. In plants hypocotylous zone constantly increasing form an enlarged basal part stem. Conducting tissues have a pattern development epicotyl. stem they are represented by collateral vascular bundles scattered among parenchymal cells, while climbing stem, conducting system complete ring. Unlike other caudiform plants, bundle system. As rule, expanded formed exclusively from it occurs mostly due generation abundant number cortical pith cells.